orb

1. A spherical body; a sphere, especially one of the celestial spheres; a sun, planet, or star. (countable, uncountable)
2. Celestial sphere; one of the azure transparent spheres conceived by the ancients to be enclosed one within another, and to carry the heavenly bodies in their revolutions. (countable, uncountable)
3. A structural motif or finial in the shape of a sphere. (countable, uncountable)
4. An orbit of an heavenly body (countable, uncountable)
5. The eye, seen as a luminous and spherical entity. (countable, uncountable)
6. Any revolving circular body, such as a wheel. (countable, uncountable)
7. A globus cruciger; a ceremonial sphere used to represent royal or imperial power. (countable, uncountable)
8. A translucent sphere appearing in flash photography (Orb (optics)). (countable, uncountable)

Plural orbs